Pulverizing apparatus



A. E. GRIFFITHS.

PULVBRIZING APPARATUS.

(No Model.)

W www W W FIG .5

INVENTOR WI T N175 SE5 %Owux3 UNITED STATES PATENT OFFICE.

AMOS E. GRIFFITHS, OF PHILADELPHIA, PENNSYLVANIA.

PULVERIZING APPARATUS.

SPEGIFI CATIONforniing part of Letters Patent No. 276,394, dated April24, 1883.

' Application filed February 9, 1883. (No model.)

To all whom it may concern Be it known that I, AMOS E. GRIFFITHS, acitizen of the United States,and a resident of Philadelphia,Pennsylvania,haveinventedcertain Improvements in Pulverizing Apparatus,of which the following is a specification.

The object of my invention is to construct a compact, powerful, andefficient machine for crushing and pulverizing ore, rock, and pulverablesubstances generally; and this object I attain in the manner which Iwill now proceed to describe, reference being had to the accompanyingdrawings, in which- Figure 1 is a longitudinal vertical section of myimproved crusher and pulverizer, the driving mechanism being shown inelevation; Fig. 2, a transverse section on the line 1 2, Fig. 1; andFig. 3, a transverse section on the line 3 4, Fig. 1. a

'A is the base or foundation of the machine, at one end of which is theframe-work carrying the bearings for the driving-shaft B, a crank on thelatter being connected by a suitable rod to an arm, a, on the vibratingcylin der D of the crusher, said cylinder being furnishedwith aprojecting jaw, E, and having journals 1), adapted to bearings 61 on thebase. The jawlfi is contained within and extends across a hopper, G,bounded partly by side plates, 6, and partly by the upper inclined jawsof two concaves, F F, the lower portions of which are concentric withorslightly eccentric in respect to the cylinder 13. The concaves F arecontained within a box comprising the side plates, e,and end plates, f,and against the concaves F bear bolts g, the threaded ends of whichproject through the end plates, f, and are furnished with nuts h-one oneach side of the plates-so that the concaves can be adjusted toward orfrom the cylinder D, parallelism of movement beinginsured by ribs 2' onthe side plates engaging with slots j in the edges of the concaves F.The vibrating cylinder and the concaves F fit snugly between the sideplates, 6 e, and in order to prevent the cylinder D frommovinglaterally, so as to bind against the side plates, 0, the outer endof each of the journals b of the cylinder has a cap, o, secured to thejournal by a bolt, 12, and bearin g against the outsideof the bearin gcl, so that any lateral movement of the cylinder independently of thebearings is rendered impossible.

Any material introduced into the hopper G must, as the cylinder D isvibrated, be crushed between the jaw E of the cylinder and thejaws y ofthe concaves F, the crushed particles, as soon as they are reduced tothe proper size, finding their way into the spaces between the cylinderD and the concaves, where they are further reduced or pulverized byattrition, the particles beingrubbed against each other, against thesurfaces of the concaves, and against the surface of the cylinder D.

As the pulverized particles are discharged from between the cylinder andconcaves they fall onto a sieve, H, the frame of which is mounted onrollers on the base A, a reciprocating motion being imparted to thesieve by means of pins 76 on the cylinder D engaging with lugs 'm, onthe sieve-frame. The sieve serves to separate from each other the coarseand fine particles, which are directed to appropriate receptacles.

Above the crushing-jaws is a feed-box, K, pivoted centrally by means ofbolts n to plates p, and extending longitudinally across the top of thisbox is a bar, 19.

On the arma of the cylinder D are lugs t t, and as said arm is vibratedthese logs come into contact with the bar .9 and cause the tilting ofthe box K first in one direction and then in the other, so that thecontents of the box are discharged through an opening, to, into thehopper G.

By means of the adjusting devices shown the spaces between the vibratingcylinder D and the concaves F can be varied as the desired fineness ofthe product may suggest.

To resist the wear to which the trituratingsurfaces of the cylinder andconcaves are subjected, I provide said cylinder and concaves withlinings w, of steel or hardened iron, as shownin Fig. 1, the liningsextending across the concaves and presenting hard surfaces, againstwhich the material is crushed by the action of the projection or jaw E.

I claim as my invention-- 1. Thecombinationoftheoppositeconnected sideplates, 6, and the concaves F, having inclined portions y, forming, withthe said side plates, a hopper, G, with the cylinder D, jour- 'naled tobearings, and having a projection, E, which extends across the hopperand forms, with the inclined portions of the conoaves, crushing-jaws,all substantially as set forth.

2. The combination of the cylinder D and its projection E with theopposite connected side plates, 0 e, the concaves F, forming, .with theside plates, a hopper, G, and the hardmetal linings 00, portions ofwhich extend into 10 the hopper, substantially as specified.

3. The combination of the cylinder D, the opposite side plates, 6 e, andconnecting-plates f, with the concaves F, adapted to guides on the saidside plates, and with set-screws g,

15 forming abutments for the concaves and made adjustable in theconnecting-plates, all substantially as described.

AMOS E. GRIFFITHS.

Witnesses:

HARRY DRURY, HARRY SMITH.

